add lisp packages

lisp/yasnippet-snippets/snippets/cc-mode/switch

@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: switch (...) { case : ... default: ...}
+# key: switch
+# --
+switch (${1:expr}) {
+case ${2:constexpr}:${3: \{}
+    $0
+    break;
+${3:$(if (string-match "\{" yas-text) "\}\n" "")}default:
+    break;
+}